Rajiformes /ˈrædʒɪfɔːrmiːz/ is one of the four orders in the superorder Batoidea, flattened cartilaginous fishes related to sharks. Rajiforms are distinguished by the presence of greatly enlarged pectoral fins, which reach as far forward as the sides of the head, with a generally flattened body. The undulatory pectoral … Visa mer Rajoids typically have a dorsoventrally flattened body. The snout is slender and pointed and the wide mouth, often covered with a fleshy nasal flap, is on the underside of the head. The eyes and well-developed spiracles … Visa mer Families Four extant and five extinct families of rajoid have been described: • Anacanthobatidae • Arhynchobatidae • Gurgesiellidae Visa mer Species of the order Rajiformes are found throughout the world's oceans, from Arctic to Antarctic waters, and from shallow coastal shelves to open seas and abyssal regions. A few are found in rivers and some in estuaries, but most are marine, living near the sea … Visa mer In most rajoids, water for breathing is taken in through the spiracles rather than through the mouth and exits through the gill slits. Most species swim by undulating their enlarged pectoral fins, but the guitarfish propel themselves through the water with sideways … Visa mer WebbLocomotion and Feeding • Via Median and Paired Fins – (6) Tetradontiforms – dorsal and anal fins synchronously – (7) Rajiform – slow undulation of pectoral fins – (8) Amiiform …

Wikizero - Batoid locomotion

WebbCurrent research suggests that some species of skates, in addition to their Rajiform locomotion, use their pelvic fins to perform ambulatory locomotion. This form of … WebbThe fish’s locomotion mechanism is mainly controlled by its caudal fin and paired pectoral fins part. They are classified into BCF (Body and/or Caudal Fin) and MPF (Median and/or … other institute

A pectoral fin analysis for diving rajiform-type fish robots

Webb15 sep. 2012 · Rajiform locomotion in fishes is dominated by distinctive undulations of expanded pectoral fins. Unlike other fishes, which typically interact with the fluid … WebbRajiforms are distinguished by the presence of greatly enlarged pectoral fins, which reach as far forward as the sides of the head, with a generally flattened body. The undulatory … Webb1 jan. 2004 · mobuliform locomotion. In a rajiform . swimming mode thrust is generated by passin g . vertical undulatio ns along the pectoral fin s. It is . defined by having more than … rockfordhills brick mansion